AVIF (AV1 Image File Format) is a next-generation image format based on the AV1 video codec. It offers 50-60% better compression than JPEG at the same visual quality. AVIF supports HDR, wide color gamut, transparency (alpha channel), and both lossy and lossless compression. It's ideal for web performance, reducing page load times significantly. Supported in Chrome 85+, Firefox 93+, and Safari 16.4+.

WebP (developed by Google) provides 25-35% better compression than JPEG/PNG. AVIF generally outperforms WebP by an additional 20-30% in compression efficiency at equivalent quality. However, WebP has broader browser support (all modern browsers) and faster encoding/decoding speeds. WebP is currently the safer choice for production, while AVIF is the future-proof option for performance-focused projects.

JPEG XL is a cutting-edge image format designed to be the ultimate replacement for JPEG. It offers superior compression (better than AVIF in many scenarios), supports lossless conversion from existing JPEGs (reducing size by ~20% without quality loss), HDR, wide gamut, and progressive decoding. However, browser support is currently limited — Chrome removed native support in 2024, though Firefox and Safari have shown interest. It's promising but not yet production-ready for web use.

Generally, AVIF and JPEG XL lead in compression efficiency, often achieving 50-70% smaller files than equivalent-quality JPEGs. WebP typically achieves 30-40% savings. However, the "best" format depends on your use case: AVIF excels for web delivery, JPEG XL for archival and lossless JPEG recompression, and WebP for maximum compatibility. Use this tool to compare actual results with your images.

When converting from JPEG to AVIF, some quality loss is inevitable because JPEG is already lossy. However, using a high quality setting (85-95) with AVIF produces visually indistinguishable results while often reducing file size significantly. For truly lossless conversion, you would need to go back to the original uncompressed source. JPEG XL uniquely supports lossless recompression of JPEG files, reducing size by ~20% with zero quality loss.

JPEG & PNG: Universal support across all browsers and devices.
WebP: Supported by 97%+ of browsers globally (Chrome, Firefox, Safari 14+, Edge).
AVIF: Supported by ~93% of browsers (Chrome 85+, Firefox 93+, Safari 16.4+, Edge 121+).
JPEG XL: Experimental — no stable browser support as of 2024. Use with caution and provide fallbacks.

This tool uses your browser's built-in Canvas API to decode the uploaded image and re-encode it into different formats using canvas.toBlob(). AVIF and WebP encoding rely on the browser's native encoders. JPEG XL encoding is not natively supported by browsers, so the tool provides estimated comparisons based on typical JPEG XL compression ratios. All processing happens locally in your browser — no images are uploaded to any server.